/**
 * pagination.js 1.5.1
 * A jQuery plugin to provide simple yet fully customisable pagination.
 * @version 1.5.1
 * @author mss
 * @url https://github.com/Maxiaoxiang/jQuery-plugins
 *
 * @调用方法
 * $(selector).pagination(option, callback);
 * -此处callback是初始化调用，option里的callback是点击页码后调用
 * 
 * -- example --
 * $(selector).pagination({
 *     ... // 配置参数
 *     callback: function(api) {
 *         console.log('点击页码调用该回调'); //切换页码时执行一次回调
 *     }
 * }, function(){
 *     console.log('初始化'); //插件初始化时调用该方法，比如请求第一次接口来初始化分页配置
 * });
 */
 ;
 (function (factory) {
     if (typeof define === "function" && (define.amd || define.cmd) && !jQuery) {
         // AMD或CMD
         define(["jquery"], factory);
     } else if (typeof module === 'object' && module.exports) {
         // Node/CommonJS
         module.exports = function (root, jQuery) {
             if (jQuery === undefined) {
                 if (typeof window !== 'undefined') {
                     jQuery = require('jquery');
                 } else {
                     jQuery = require('jquery')(root);
                 }
             }
             factory(jQuery);
             return jQuery;
         };
     } else {
         //Browser globals
         factory(jQuery);
     }
 }(function ($) {
 
     //配置参数
     var defaults = {
         totalData: 0, //数据总条数
         showData: 0, //每页显示的条数
         pageCount: 9, //总页数,默认为9
         current: 1, //当前第几页
         prevCls: 'prev', //上一页class
         nextCls: 'next', //下一页class
         prevContent: '<', //上一页内容
         nextContent: '>', //下一页内容
         activeCls: 'active', //当前页选中状态
         coping: false, //首页和尾页
         isHide: false, //当前页数为0页或者1页时不显示分页
         homePage: '', //首页节点内容
         endPage: '', //尾页节点内容
         keepShowPN: false, //是否一直显示上一页下一页
         mode: 'unfixed', //分页模式，unfixed：不固定页码数量，fixed：固定页码数量
         count: 4, //mode为unfixed时显示当前选中页前后页数，mode为fixed显示页码总数
         jump: false, //跳转到指定页数
         jumpIptCls: 'jump-ipt', //文本框内容
         jumpBtnCls: 'jump-btn', //跳转按钮
         jumpBtn: '跳转', //跳转按钮文本
         callback: function () {} //回调
     };
 
     var Pagination = function (element, options) {
         //全局变量
         var opts = options, //配置
             current, //当前页
             $document = $(document),
             $obj = $(element); //容器
 
         /**
          * 设置总页数
          * @param {int} page 页码
          * @return opts.pageCount 总页数配置
          */
         this.setPageCount = function (page) {
             return opts.pageCount = page;
         };
 
         /**
          * 获取总页数
          * 如果配置了总条数和每页显示条数，将会自动计算总页数并略过总页数配置，反之
          * @return {int} 总页数
          */
         this.getPageCount = function () {
             return opts.totalData && opts.showData ? Math.ceil(parseInt(opts.totalData) / opts.showData) : opts.pageCount;
         };
 
         /**
          * 获取当前页
          * @return {int} 当前页码
          */
         this.getCurrent = function () {
             return current;
         };
 
         /**
          * 填充数据
          * @param {int} 页码
          */
         this.filling = function (index) {
             var html = '';
             current = parseInt(index) || parseInt(opts.current); //当前页码
             var pageCount = this.getPageCount(); //获取的总页数
             switch (opts.mode) { //配置模式
                 case 'fixed': //固定按钮模式
                     html += '<a href="javascript:;" class="' + opts.prevCls + '">' + opts.prevContent + '</a>';
                     if (opts.coping) {
                         var home = opts.coping && opts.homePage ? opts.homePage : '1';
                         html += '<a href="javascript:;" data-page="1">' + home + '</a>';
                     }
                     var start = current > opts.count - 1 ? current + opts.count - 1 > pageCount ? current - (opts.count - (pageCount - current)) : current - 2 : 1;
                     var end = current + opts.count - 1 > pageCount ? pageCount : start + opts.count;
                     for (; start <= end; start++) {
                         if (start != current) {
                             html += '<a href="javascript:;" data-page="' + start + '">' + start + '</a>';
                         } else {
                             html += '<span class="' + opts.activeCls + '">' + start + '</span>';
                         }
                     }
                     if (opts.coping) {
                         var _end = opts.coping && opts.endPage ? opts.endPage : pageCount;
                         html += '<a href="javascript:;" data-page="' + pageCount + '">' + _end + '</a>';
                     }
                     html += '<a href="javascript:;" class="' + opts.nextCls + '">' + opts.nextContent + '</a>';
                     break;
                 case 'unfixed': //不固定按钮模式
                     if (opts.keepShowPN || current > 1) { //上一页
                         html += '<a href="javascript:;" class="' + opts.prevCls + '">' + opts.prevContent + '</a>';
                     } else {
                         if (opts.keepShowPN == false) {
                             $obj.find('.' + opts.prevCls) && $obj.find('.' + opts.prevCls).remove();
                         }
                     }
                     if (current >= opts.count + 2 && current != 1 && pageCount != opts.count) {
                         var home = opts.coping && opts.homePage ? opts.homePage : '1';
                         html += opts.coping ? '<a href="javascript:;" data-page="1">' + home + '</a><span>...</span>' : '';
                     }
                     var start = (current - opts.count) <= 1 ? 1 : (current - opts.count);
                     var end = (current + opts.count) >= pageCount ? pageCount : (current + opts.count);
                     for (; start <= end; start++) {
                         if (start <= pageCount && start >= 1) {
                             if (start != current) {
                                 html += '<a href="javascript:;" data-page="' + start + '">' + start + '</a>';
                             } else {
                                 html += '<span class="' + opts.activeCls + '">' + start + '</span>';
                             }
                         }
                     }
                     if (current + opts.count < pageCount && current >= 1 && pageCount > opts.count) {
                         var end = opts.coping && opts.endPage ? opts.endPage : pageCount;
                         html += opts.coping ? '<span>...</span><a href="javascript:;" data-page="' + pageCount + '">' + end + '</a>' : '';
                     }
                     if (opts.keepShowPN || current < pageCount) { //下一页
                         html += '<a href="javascript:;" class="' + opts.nextCls + '">' + opts.nextContent + '</a>';
                     } else {
                         if (opts.keepShowPN == false) {
                             $obj.find('.' + opts.nextCls) && $obj.find('.' + opts.nextCls).remove();
                         }
                     }
                     break;
                 case 'easy': //简单模式
                     break;
                 default:
             }
             html += opts.jump ? '<input type="text" class="' + opts.jumpIptCls + '"><a href="javascript:;" class="' + opts.jumpBtnCls + '">' + opts.jumpBtn + '</a>' : '';
             $obj.empty().html(html);
         };
 
         //绑定事件
         this.eventBind = function () {
             var that = this;
             var pageCount = that.getPageCount(); //总页数
             var index = 1;
             $obj.off().on('click', 'a', function () {
                 if ($(this).hasClass(opts.nextCls)) {
                     if ($obj.find('.' + opts.activeCls).text() >= pageCount) {
                         $(this).addClass('disabled');
                         return false;
                     } else {
                         index = parseInt($obj.find('.' + opts.activeCls).text()) + 1;
                     }
                 } else if ($(this).hasClass(opts.prevCls)) {
                     if ($obj.find('.' + opts.activeCls).text() <= 1) {
                         $(this).addClass('disabled');
                         return false;
                     } else {
                         index = parseInt($obj.find('.' + opts.activeCls).text()) - 1;
                     }
                 } else if ($(this).hasClass(opts.jumpBtnCls)) {
                     if ($obj.find('.' + opts.jumpIptCls).val() !== '') {
                         index = parseInt($obj.find('.' + opts.jumpIptCls).val());
                     } else {
                         return;
                     }
                 } else {
                     index = parseInt($(this).data('page'));
                 }
                 that.filling(index);
                 typeof opts.callback === 'function' && opts.callback(that);
             });
             //输入跳转的页码
             $obj.on('input propertychange', '.' + opts.jumpIptCls, function () {
                 var $this = $(this);
                 var val = $this.val();
                 var reg = /[^\d]/g;
                 if (reg.test(val)) $this.val(val.replace(reg, ''));
                 (parseInt(val) > pageCount) && $this.val(pageCount);
                 if (parseInt(val) === 0) $this.val(1); //最小值为1
             });
             //回车跳转指定页码
             $document.keydown(function (e) {
                 if (e.keyCode == 13 && $obj.find('.' + opts.jumpIptCls).val()) {
                     var index = parseInt($obj.find('.' + opts.jumpIptCls).val());
                     that.filling(index);
                     typeof opts.callback === 'function' && opts.callback(that);
                 }
             });
         };
 
         //初始化
         this.init = function () {
             this.filling(opts.current);
             this.eventBind();
             if (opts.isHide && this.getPageCount() == '1' || this.getPageCount() == '0') {
                 $obj.hide();
             } else {
                 $obj.show();
             }
         };
         this.init();
     };
 
     $.fn.pagination = function (parameter, callback) {
         if (typeof parameter == 'function') { //重载
             callback = parameter;
             parameter = {};
         } else {
             parameter = parameter || {};
             callback = callback || function () {};
         }
         var options = $.extend({}, defaults, parameter);
         return this.each(function () {
             var pagination = new Pagination(this, options);
             callback(pagination);
         });
     };
 
 }));